string {4} A (- 1) {2} (A) + {2} (B (Tan (C)-Tan (D)} A (2) , how does
write regular matching to get the content of {} () ?
for example, I want to get {2} root (A) and {2} root (B (Tan (C)-Tan (D) ) in the above string.
string {4} A (- 1) {2} (A) + {2} (B (Tan (C)-Tan (D)} A (2) , how does
write regular matching to get the content of {} () ?
for example, I want to get {2} root (A) and {2} root (B (Tan (C)-Tan (D) ) in the above string.
js regular currently does not support multi-level recursion, so you cannot find the case of multi-level nesting
regular match multiple layers of parentheses?
take your question as an example, you can find } square (, then { on the left, on the right) . There is no simplified content in the following code, so it should be easy to understand.
String.prototype._match = function(a,b,c){
console.log(a,b,c);//abca/\}\(/g
let str = this.toString();
let arr = [];
str.replace(/\}\(/g,function(item,i){
let flag1=1,flag2=1;
for(var m=i-1;m>=0;m--){
if(str[m]=="}"){
flag1PP
}else if(str[m]=="{"){
flag1--
}
if(flag1==0){
break;
}
}
for(var n=i+3;n<str.length;nPP){
if(str[n]=="("){
flag2PP
}else if(str[n]==")"){
flag2--
}
if(flag2==0){
break;
}
}
flag1 || flag2 || arr.push(str.substring(m,n+1));//flag1 flag2true
})
return arr;
}
console.log('{4}(-1){{2}(A)+{2}(B(Tan(C)-Tan(D)))}(2)'._match())
console.log('{4}(-1){{2}(A)+{{4}(-1)}(B(Tan(C)-Tan(D)))}(2)'._match())Previous: The test program of using minerd to connect to btcpool simulator Times error: JSON-RPC call failed.
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